
var $ = function(){
    return new Base();
}
function Base(id){
	//创建一个s数组，来保存获取的节点和节点数组
	this.elements=[];
	//获取ID节点
	this.getId = function(id){
		this.elements.push(document.getElementById(id));
		return this;
	};
	//获取元素节点
	this.getTagName = function(tag){
		var tags = document.getElementsByTagName(tag);
		for(var i=0;i<tags.length;i++){
			this.elements.push(tags[i]);
		}
		return this;
	}
}

Base.prototype.css = function(attr,value){
	for(var i = 0;i<this.elements.length;i++){
		this.elements[i].style[attr] = value;
	}
	return this;
}

Base.prototype.html = function(str){
	for(var i = 0;i<this.elements.length;i++){
		this.elements[i].innerHTML = str;
	}
	return this;
}

Base.prototype.click = function(fn){
	for(var i = 0;i<this.elements.length;i++){
		this.elements[i].onclick = fn;
	}
	return this;
}